Physics Letters A最新文献_第7页

Spectrum of a two-level quasiparticle renormalized by interaction with polarization phonons at weak interlevel coupling 弱能级间耦合下与极化声子相互作用重正化的两能级准粒子谱

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-17 DOI: 10.1016/j.physleta.2025.130556

Julia Seti , Igor Boyko

引用次数: 0

Shielding effect of screw dislocations near the circular orifice in one-dimensional hexagonal piezoelectric quasicrystals 一维六边形压电准晶体圆孔附近螺位错的屏蔽效应

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-17 DOI: 10.1016/j.physleta.2025.130559

Yuanyuan Gao , Guanting Liu

引用次数: 0

Theoretical investigations on structural evolution, photoelectron spectroscopy and electronic properties of precious metal silver doped boron clusters 贵金属银掺杂硼团簇结构演化、光电子能谱及电子性能的理论研究

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-17 DOI: 10.1016/j.physleta.2025.130553

Peixin Fu , Bole Chen , Weiguo Sun , Cheng Lu

{"title":"Theoretical investigations on structural evolution, photoelectron spectroscopy and electronic properties of precious metal silver doped boron clusters","authors":"Peixin Fu , Bole Chen , Weiguo Sun , Cheng Lu","doi":"10.1016/j.physleta.2025.130553","DOIUrl":"10.1016/j.physleta.2025.130553","url":null,"abstract":"<div><div>The growth mechanism of borophene on silver substrates is fundamentally linked to silver-boron bonding interactions, yet the structural evolution and bonding characteristics of Ag-B clusters remain poorly understood. Here, we present a theoretical study into a range of silver-doped boron clusters using the CALYPSO cluster structural prediction method combined with density-functional theory (DFT) calculations. Global minimum searches reveal that the most AgB<span><math><msubsup><mrow></mrow><mrow><mi>n</mi></mrow><mrow><mo>−</mo></mrow></msubsup></math></span> clusters possess planar or quasi-planar structures with the Ag atom clinging to the edge of the B<sub><em>n</em></sub> moiety. Based on these ground-state structures, we successfully simulated the photoelectron spectroscopy of silver-boron clusters. The aromatic AgB<span><math><msubsup><mrow></mrow><mrow><mn>18</mn></mrow><mrow><mo>−</mo></mrow></msubsup></math></span> cluster with a quasi-planar configuration (<sup>1</sup>A, <span><math><msub><mrow><mi>C</mi></mrow><mrow><mn>1</mn></mrow></msub></math></span>) is found to exhibit the largest vertical detachment energy in the photoelectron spectra and show excellent stability. Further bonding analysis reveals that the most stable quasi-planar aromatic structure is formed by the significant interactions (3c-2e <em>σ</em>-bonds) between Ag and the main boron cluster, which are contributed by the Ag-5<em>s</em> and B-2<em>p</em> atomic orbitals, as well as by the presence of B-B <em>σ</em>-bonds within the main boron cluster. These results quantitatively establish the synergy between dative charge transfer and multicenter bonding in Ag-B systems, providing atomistic insights into borophene nucleation processes on silver surfaces. The identified structural motifs and bonding patterns lay a theoretical foundation for designing boron-based nanomaterials with tailored metal-doping configurations.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"548 ","pages":"Article 130553"},"PeriodicalIF":2.3,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electronic structure, magnetic anisotropy and Curie temperature of multiferroic MnSe2/Sc2CO2 van der Waals heterostructures 多铁MnSe2/Sc2CO2范德华异质结构的电子结构、磁各向异性和居里温度

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-15 DOI: 10.1016/j.physleta.2025.130555

Shiying He , Huimin Qu , Daifeng Zou

{"title":"Electronic structure, magnetic anisotropy and Curie temperature of multiferroic MnSe2/Sc2CO2 van der Waals heterostructures","authors":"Shiying He , Huimin Qu , Daifeng Zou","doi":"10.1016/j.physleta.2025.130555","DOIUrl":"10.1016/j.physleta.2025.130555","url":null,"abstract":"<div><div>The integration of ferromagnetic and ferroelectric materials induces perpendicular magnetic anisotropy, a phenomenon that has garnered significant attention in the field of spintronics. In this study, two-dimensional multiferroic MnSe<sub>2</sub>/Sc<sub>2</sub>CO<sub>2</sub> van der Waals heterostructures were fabricated, and their magnetoelectric coupling properties were systematically investigated using first-principles calculations. By deliberately modulating the polarization states, it was observed that the easy magnetization axes consistently aligned out-of-plane, a hallmark of Heisenberg ferromagnetism. Moreover, through atom-resolved and orbital-resolved magnetic anisotropy energy (MAE) analyses, the fundamental mechanisms governing polarization-controlled magnetic anisotropy in the MnSe<sub>2</sub>/Sc<sub>2</sub>CO<sub>2</sub> heterostructures were elucidated. Notably, the heterostructures exhibited a significant shift in the Schottky barrier height upon ferroelectric polarization reversal. Additionally, Monte Carlo simulations were utilized to estimate the Curie temperature (<em>T</em><sub>C</sub>) of the MnSe<sub>2</sub>/Sc<sub>2</sub>CO<sub>2</sub> heterostructures. These findings not only contribute to the advancement of next-generation spintronics and non-volatile electrical control but also provide a foundational framework for the design of high-performance nanoscale devices with enhanced functional capabilities.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"548 ","pages":"Article 130555"},"PeriodicalIF":2.3,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Density response and correlation functions in the Wigner path integral representation. Monte Carlo simulations 维格纳路径积分表示法中的密度响应和相关函数。蒙特卡罗模拟

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-15 DOI: 10.1016/j.physleta.2025.130542

Vladimir Filinov, Pavel Levashov, Alexander Larkin

引用次数: 0

A rogue wave-type irrational solution for the modified Korteweg-de Vries equation 修正Korteweg-de Vries方程的不规则波型非合理解

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-15 DOI: 10.1016/j.physleta.2025.130543

Xianghua Jiang , Xifang Cao

引用次数: 0

Rapidly trainable and shallow-compiled quantum approximate optimization algorithm for maximum likelihood detection 快速可训练的浅编译最大似然检测量子近似优化算法

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-14 DOI: 10.1016/j.physleta.2025.130541

Yuxiang Liu , Yinuo Qian , Lu Wang , Zaichen Zhang , Xutao Yu

{"title":"Rapidly trainable and shallow-compiled quantum approximate optimization algorithm for maximum likelihood detection","authors":"Yuxiang Liu , Yinuo Qian , Lu Wang , Zaichen Zhang , Xutao Yu","doi":"10.1016/j.physleta.2025.130541","DOIUrl":"10.1016/j.physleta.2025.130541","url":null,"abstract":"<div><div>In multiple-input and multiple-output (MIMO) systems, the maximum likelihood (ML) detection problem is NP-hard and becomes increasingly complex with more transmitting antennas and symbols. The quantum approximate optimization algorithm (QAOA), a leading candidate algorithm running in the noisy intermediate-scale quantum (NISQ) devices, can show quantum advantage for approximately solving combinatorial optimization problems. In this paper, we propose an improved QAOA based maximum likelihood detection. In the proposed scheme, we use ZX-calculus to prove the parameter symmetry in QAOA circuits, which can be used to reduce the search space and accelerate the training process. Moreover, to run QAOA on quantum devices, an improved qubit mapping method with simultaneous gate absorption is proposed, which can compile the quantum circuit of the QAOA to satisfy the connectivity constraints of real quantum devices with fewer CNOT counts. In numerical experiments, our scheme accelerates parameter training by an average of 29.8% and uses fewer CNOT gates and shallower circuit depth during compilation. This demonstrates that our scheme has significant advantages over the traditional scheme.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"548 ","pages":"Article 130541"},"PeriodicalIF":2.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Breathing dynamics of a one-dimensional quantum droplet induced by interaction quenching 相互作用猝灭诱导一维量子液滴的呼吸动力学

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-14 DOI: 10.1016/j.physleta.2025.130534

Bolong Li , Liang Duan , Shiyi Wang , Zhan-Ying Yang

引用次数: 0

Dynamic evolution of quantum Fisher and skew information under decoherence in three-qubit X-states 三量子位x态退相干下量子Fisher和偏态信息的动态演化

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-14 DOI: 10.1016/j.physleta.2025.130536

A. Naimy , A. Slaoui , A. Ali , H. El Hadfi , R. Ahl Laamara , S. Al-Kuwari

{"title":"Dynamic evolution of quantum Fisher and skew information under decoherence in three-qubit X-states","authors":"A. Naimy , A. Slaoui , A. Ali , H. El Hadfi , R. Ahl Laamara , S. Al-Kuwari","doi":"10.1016/j.physleta.2025.130536","DOIUrl":"10.1016/j.physleta.2025.130536","url":null,"abstract":"<div><div>Quantum metrology leverages quantum effects such as squeezing, entanglement, and other quantum correlations to boost precision in parameter estimation by saturating the quantum Cramér-Rao bound, which can be achieved by optimizing quantum Fisher information (QFI) or Wigner-Yanase skew information (SI). QFI evaluates the sensitivity of a quantum state to infinitesimal variations in a parameter, determining the maximum precision of its estimate. In contrast, SI measures the non-commutativity between a quantum state and an observable, illustrating the perturbative effect of that measurement. This work provides analytical expressions for quantum Fisher and skew information in a general three-qubit X-state and examines their evolution under phase damping, depolarization, and phase-flip decoherence channels. To illustrate the validity of our method, we investigate their dynamics for a three-qubit Greenberger-Horne-Zeilinger (GHZ) state subjected to various memoryless decoherence channels. Closed-form expressions for QFI and SI are derived for each channel. By comparing these metrics with the entanglement measure of concurrence, we demonstrate the impact of decoherence on measurement precision for quantum metrology. Our results indicate that phase damping and phase-flip channels generally allow for better parameter estimation compared to depolarization. This study provides insights into the optimal selection of noise channels for enhancing precision in quantum metrological tasks involving multi-qubit entangled states.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"547 ","pages":"Article 130536"},"PeriodicalIF":2.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143838860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First-principles calculations of M2SB (M = Hf, Zr and Nb) under high pressure 高压条件下M2SB （M = Hf， Zr和Nb）的第一性原理计算

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-04-12 DOI: 10.1016/j.physleta.2025.130551

Shiyi Chen , He Ma , Xudong Zhang , Lijia Chen , Hao Wu , Haonan Li

引用次数: 0